Bicycle.



f rm 655,697. `Patented' Aug. I4, mom

w. c. nuNN.

BICYCLE.

(Application led Nov. 1l, 1899.)

(No llodel.)

4nrrnn S'rn'rns PATENT Drunen..

WILLIAM C. DUNN, OF LOGANSPOR'I, INDIANA.l

BICYCLE.

SPECIFICATION forming part of Letters Patent No. 655,697, dated August 14, 1.900.

Application tiled November 11, 1899. Serial No. 736,716. (No model.)

T0 all whom it may 0072/037071,.-

Be it known that I, WILLIAM C. DUNN, a

citizen of the United States, residing at Logansport, in the county of Cass and State of Indiana,have invented certain new and useful Improvements in Bicycles; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to certain new and useful improvements in bicycles of the chainless type, and more particularly to that class of chainless Wheels in which bevel-gears are. employed.

It has for its objects, among others, to provide an improved construction in which the parts shall be compactly arranged and disposed in a novel manner, the three gears being all about the one center. The crank-axle and the intermediate gear being made at a certain angle and placed on another bearing of a certain angle gives opportunity of getting any gearing desired.

on the frame which inclo'ses the crank-axle. The gears are all inclosed within the hub of the Wheel through which the crank axle passes. The cranks are connected to rods or levers at points one side of their longitudinal centers, and the rear ends of these rods or levers are pivotally connected to arms that in turn are pivoted to projections on the frame below the axis to constitute pulls on the rods or levers.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically defined by the appended claim.

The invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this specification, and in which-- Figure 1 is an elevation of a bicycle embodying my present invention, Fig. 2 is an enlarged substantially-central section through the hub of the gearewheel.

Like letters of reference indicate like parts throughout the dierent views.

Referring now to the details of the drawings by letter, A designates the crank-axle, having the cranks a, as seen clearly in Fig, 2.

The intermediategear has its bearing on a stud or projection B is a bevel-gear secured to the crank-axle in any of the well-known Ways.

C is the frame of the bicycle, in Which the crank-axle has ball-bearings of known4 construction, as seen at c c.

D is a sleeve supported at oneend on the frame C, as shown best in Fig. 2, and surrounding the axle A for a greater portion of the length of the latter. This sleeve performs important functions, as will hereinafter appear. It is eXteriorly screw-threaded near its outer end, as seen at d, to receive the adjustable cone E for the ball-bearing F ot' the bevel-gear G, which is fast with the hub H of the rear Wheel, Whichcarries a 'casing 7L or hub, to which the spokes I are attached. The inn4 ner end of this sleeve has an angularly-disposed bearingyv for the balls J of the intermediate gear K, which is provided with the gear= teeth 7e, set at an angle, as shown, and meshing with the Abevel-gearl, While at the op; posite edge of the intermediate gear are the teeth 7c,which mesh with the gear G,as clearly shown in Fig. 2. gear B is fast upon the axle, gear K has a bearing concentric with, but independent of, the said axle, and gear Ghas a bearing concen# tric with, but independent of, the axle, and gear B imparts its motion to gear K, which in turn transmits'power to the gear G and to the rear wheel.

The outer ends of the cranks are connected to the levers L at the points Z, which is preferably three-tenths from the rear end of the said levers. The rear end of each lever Lispivotally connected, as at M, to the rod N,

the other end of which is pivotally connected, as at O, with the projection or arm P on the lower longitudinal bar of the bicycle-frame and braced by the brace Q, all as clearly shown in Fig. 1, it being understood that there is a lever, rod, and arm on each side of the machine.

Vith the parts arranged as above described the operation will be readily understood,l and a detailed description thereof is not deemed necessary. y

r he teeth Will be shaped with4 sufficient play t0 allow forA the angular disposition'of the intermediate gear, as will be readily understood.

It is deemed important that the sleeve be loo of larger interior diam-eter than the crankthe said inclined bearing of the sleeve and axle, so that the latter will be held out of having angularly-disposed teeth upon its op- Vcontact therewith throughout the length of posite faces to mesh directly With the gears on I5 the sleeve, and thus the frictional contact of the axle and hub whereby rot-ation of the axle 5 these parts prevented. imparts a rotary movement to said hub, as set What I claim as ne7 is forth. The combination With the crank-axle, the In testimony Whereot` I affix my signature sleeve eccentric therewith and held out of conin presence of two Witnesses.

tact therewith, and having inclined ball-bear- WILLIAM C. DUNN. 1o ing surrounding the same, of a gear fast upon Witnesses:

said axle, a hub, a gear movable therewith, JAMES A. COTNER,

and a gear havin-g an inclined hall-bearing on FREDERICK LUNDER. 

